From owner-freebsd-current  Tue Feb 18 17:11:36 2003
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 060EA37B401
	for <current@freebsd.org>; Tue, 18 Feb 2003 17:11:34 -0800 (PST)
Received: from Shenton.org (23.ebbed1.client.atlantech.net [209.190.235.35])
	by mx1.FreeBSD.org (Postfix) with SMTP id 9A84D43F85
	for <current@freebsd.org>; Tue, 18 Feb 2003 17:11:32 -0800 (PST)
	(envelope-from chris@Shenton.Org)
Received: (qmail 37799 invoked by uid 1000); 19 Feb 2003 01:11:31 -0000
To: current@freebsd.org
Subject: Re: Diskless: 5.0R scripts, boot, NFS mount problems I didn't have in 4.7S
References: <87el65pi4e.fsf@Pectopah.shenton.org>
From: Chris Shenton <chris@shenton.org>
Date: 18 Feb 2003 20:11:31 -0500
In-Reply-To: <87el65pi4e.fsf@Pectopah.shenton.org>
Message-ID: <87fzql6pmk.fsf@Pectopah.shenton.org>
Lines: 72
User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.2
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Sender: owner-freebsd-current@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-current.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-current>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-current>
X-Loop: FreeBSD.ORG

Chris Shenton <chris@shenton.org> writes:

> I've moved the "mount -a" near the top of rc.d/diskless since it
> runs commands which are and not available until /usr is mounted
> (e.g., mtree).  The NFS mount fails with a message I don't
> understand:
> 
>   [udp] pectopah.shenton.org:/usr: RPCPROG_NFS: RPC: Unknown host

Tasteless self-followup:

I get the same error when the boot process fails and drops me to a
shell; I can get it with UDP or TCP mounts. For example:

  mount_nfs -U -2 192.168.255.185:/usr /mnt
  mount_nfs -U -3 192.168.255.185:/usr /mnt
  mount_nfs -T -2 192.168.255.185:/usr /mnt
  mount_nfs -T -3 192.168.255.185:/usr /mnt

The only difference is the [udp] vs [tcp] in the error msg:

  [tcp] 192.168.255.185:/usr: RPCPROG_NFS: RPC: Unknown host

I sniffed traffic with tcpdump and ethereal: the diskless client is
contacting the server so it's not having problems resolving that IP
addr.

I'm not hard-core enough to understand what might cause this failure,
which occurs in /usr/src/sbin/mount_nfs/mount_nfs.c:

	if (portspec != NULL) {
		/* `ai' contains the complete nfsd sockaddr. */
		nfs_nb.buf = ai->ai_addr;
		nfs_nb.len = nfs_nb.maxlen = ai->ai_addrlen;
	} else {
		/* Ask the remote rpcbind. */
		nfs_nb.buf = &nfs_ss;
		nfs_nb.len = nfs_nb.maxlen = sizeof nfs_ss;

		if (!rpcb_getaddr(RPCPROG_NFS, nfsvers, nconf, &nfs_nb,
		    hostp)) {
			if (rpc_createerr.cf_stat == RPC_PROGVERSMISMATCH &&
			    trymntmode == ANY) {
				trymntmode = V2;
				goto tryagain;
			}
			snprintf(errbuf, sizeof errbuf, "[%s] %s:%s: %s",
			    netid, hostp, spec,
			    clnt_spcreateerror("RPCPROG_NFS"));
			return (returncode(rpc_createerr.cf_stat,
			    &rpc_createerr.cf_error));
		}
	}

To see if this was a portmapper/rpcbind issue, I tried doing the
client mount and specifying the port:

  mount -o port=2049 192.168.255.185:/usr /mnt

and got a slightly different error:

  [udp] 192.168.255.185:/usr: RPCMNT: clnt_create: RPC: Unknown host

and now I'm definitely over my head trying to read mount_nfs.c. :-(


I don't understand this since the client is able to mount
/usr/local/diskless to get the root filesystem and run the kernel.
But I believe pxeboot is doing this, not a full FreeBSD binary.
What's the difference in the way the mount?

Any suggestions? Thanks.

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-current" in the body of the message